The Atbara porphyry gold–copper systems in the Red Sea Hills, Neoproterozoic Arabian–Nubian Shield, NE Sudan

Şaşmaz, Ahmet

doi:10.1016/j.gexplo.2020.106539

Cited by 17 publications

(2 citation statements)

References 21 publications

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“…Magnetite Raman peaks were observed at 336.63 cm −1 , 308.15 cm −1 , and 253.52 cm −1 (Figure 10). Some studies have primarily focused on magnetite, while others have focused on secondary magnetite reactions [42,[74][75][76]. Magnetite is the mineral most studied using Raman spectroscopy in the literature.…”

Section: Inclusionsmentioning

confidence: 99%

Garnet Geochemistry of Pertek Skarns (Tunceli, Turkey) and U-Pb Age Findings

Kilic,

Konakci,

Sasmaz

2024

Minerals

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The Fe skarn and vein-type Cu mineralization types are common in the Eastern Taurus Mountains. This study aims to determine the U-Pb geochronology of garnets of varying sizes within the skarn zone developed at the quartz diorite–marble contact zone in Ayazpınar, Pertek District, Tunceli Province, Turkey. Additionally, this study aims to determine the age of the skarnization and the types of inclusion minerals in the garnets. Faulting and magma emplacement along the thrust plane caused mineralization in the Eastern Taurus Mountains, especially at the marble and quartz diorite contact zone between the cities of Elazığ and Tunceli. The greenish garnets found in the Ayazpınar deposit are characteristic of distal skarns, while red or brown Pertek garnets are observed in the proximal skarns. The garnets typically feature a core–rim texture. The cores of the garnet crystals are large, reddish in color, and have a high REE (Ce, Pr) content. Moreover, the cores have higher Fe and lower Al ratios, alongside higher La, Ce, and Pr contents, than the rims. We propose that the compositional differences between the rims and the cores reflect the transition from oxidized REE- and Fe3+-rich liquids to liquids with lower REE and Fe3+ contents, producing the differences in the garnet colors. Green garnets show lower REE contents than brown garnets with Fe-rich cores. The skarn under study includes the following successively formed zones: diorite → epidote skarn → garnet–magnetite → pyrite–garnet–magnetite → calcite carbonate. Diopside, magnetite, and hematite, including small grains, are surrounded or enveloped by garnets. The U-Pb age of the mineralization is 74.1 ± 5 Ma, indicating that the mineralization occurred concurrently with the intrusion settlement.

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Section: Inclusionsmentioning

confidence: 99%

Garnet Geochemistry of Pertek Skarns (Tunceli, Turkey) and U-Pb Age Findings

Kilic,

Konakci,

Sasmaz

2024

Minerals

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“…The confluence of the Blue Nile and White Nile forming its major artery of the Greater Nile near Khartoum results in a high concentration of the population in this district. Furthermore, consequences of the desertification also drive people into Khartoum, thereby increasing the urbanisation and the environmental pressure in the region [79,80], and the Atbara River (Red Nile) has high levels of mining activities related to resource exploration [81].…”

Section: Study Areamentioning

confidence: 99%

Multispectral Satellite Image Analysis for Computing Vegetation Indices by R in the Khartoum Region of Sudan, Northeast Africa

Lemenkova

Debeir

2023

J. Imaging

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Desertification is one of the most destructive climate-related issues in the Sudan–Sahel region of Africa. As the assessment of desertification is possible by satellite image analysis using vegetation indices (VIs), this study reports on the technical advantages and capabilities of scripting the ‘raster’ and ‘terra’ R-language packages for computing the VIs. The test area which was considered includes the region of the confluence between the Blue and White Niles in Khartoum, southern Sudan, northeast Africa and the Landsat 8–9 OLI/TIRS images taken for the years 2013, 2018 and 2022, which were chosen as test datasets. The VIs used here are robust indicators of plant greenness, and combined with vegetation coverage, are essential parameters for environmental analytics. Five VIs were calculated to compare both the status and dynamics of vegetation through the differences between the images collected within the nine-year span. Using scripts for computing and visualising the VIs over Sudan demonstrates previously unreported patterns of vegetation to reveal climate–vegetation relationships. The ability of the R packages ‘raster’ and ‘terra’ to process spatial data was enhanced through scripting to automate image analysis and mapping, and choosing Sudan for the case study enables us to present new perspectives for image processing.

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Magmatic—Hydrothermal Deposits (Intrusion-Related Deposits)

Ahmed

2022

Mineral Deposits and Occurrences in the Arabian–Nubian Shield

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The Atbara porphyry gold–copper systems in the Red Sea Hills, Neoproterozoic Arabian–Nubian Shield, NE Sudan

Cited by 17 publications

References 21 publications

Garnet Geochemistry of Pertek Skarns (Tunceli, Turkey) and U-Pb Age Findings

Garnet Geochemistry of Pertek Skarns (Tunceli, Turkey) and U-Pb Age Findings

Multispectral Satellite Image Analysis for Computing Vegetation Indices by R in the Khartoum Region of Sudan, Northeast Africa

Magmatic—Hydrothermal Deposits (Intrusion-Related Deposits)

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